摘要
3年试验结果指出,中棉12号在浙东滨海棉区采用地膜覆盖栽培,皮棉亩产超100公斤的6项配套技术的95%置信区间是:播种期(x_1)为4月11日～13日,基肥(棉仁粉)用量(x_2)为40.7～44.0公斤/亩,氮素化肥用量(x_3)为7.53～8.37公斤/亩,盖膜天数(x_4)为102～111天,植株密度(x_5)为5400～5600株/亩,打顶期(x_6)为7月14日～16日。这套数学模型在近2年台风和暴雨频繁发生的条件下,经多点示范,皮棉亩产69.7～94.5公斤,平均为81.1公斤,比对照71.5公斤增产13.43%。在配套技术中,对皮棉增产作用最大的前3项依次是:氮素化肥用量>盖膜天数>基肥用量。氮素化肥用量与籽棉黄花率的相关极显著(r=0.8244^(**));基肥用量对提高产量和纤维整齐度的作用较大(r=0.4410~*)。
The results of 3-year field expriments indicated that the 95% percent confidence interval of sowing date((x_1),the rate of cotton-seed cake applied(x2),the rate of N fertilizer as topdressing(x_3), film mulching time(x_4),plant density(x_5)and date of decapitation(x_6)were Apr.11-13, 40.7-44.0Kg/mu,7.53-8.37Kg/mu,102-111 days,5400-5600 Plants/mu and July 14-16 respectively when film mulching was adopted in cotton(c.v.Zhongmiansuo 12)culture with its lint yield of 100 Kg/mu or more in the coastal cotton growing area of east Zhejiang.In the latest 2 years under adverse weather conditions,this mathematics model in many demonstration localities gave lint yield of 69.7-94.5Kg/mu with a mean yield of 81.1Kg/mu,13.43 percent over the control,Among these 6 cultural practices,the rate of N fertilizer,film mulching time and the rate of cotton-seed cake applied had a greastest contribution to lint cotton yield in turn.The rate of N fertilizer was highly significantly correlated with the rate of rotten seed cotton(r=0.8244^(**)).In addition,the rate of cottonseed cake applied was also significantly correlated with fibre uniformity(r=0.4410~*).
出处
《浙江农业学报》
CSCD
1990年第3期111-116,共6页
Acta Agriculturae Zhejiangensis
关键词
棉花
地膜覆盖
栽培
数学模型
产量
Mathematics model
Lint cotton yield
Rotton seed cotton rate
Fibre quality
